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To develop environmental friendly cement composites and their production technologies from the technological waste

Cement composites created from the pellets, which are produced by using technogenic waste, will be used in bearing thermal insulation (and thermal insulation sheets and form production), partitions, technological equipment for preparing a forming mass of composites and for filling the formation

This thesis will discuss two problems: Firstly, to dispose technological waste resulting from the production and at the same time, to decrease pollution of nature by technological waste. Secondly, to adapt technological waste for of creation new effective constructional composites that could be used in partition structures of buildings, by ensuring new and high quality exploitation qualities. Production technologies of new constructional composites would allow applying new construction technologies, which would ensure direct formation of partitions in the object. New technological solutions would help to reduce costs of building residential housing, as well as to ensure comfortable environment at the premises of residence. In order to achieve these goals, it would be necessary to use blown glass pellets produced from technologic waste. In Lithuania, blown glass pellets are made of glass waste, and in the Czech Republic blown glass pellets are made of thermal slag from thermal power stations additionally processed technological waste is becoming one of the main raw materials in the production of blown pellets. The density of blown glass pellets produced in Lithuania is 130 – 310 kg/m3, in Czech Republic, the density is 350 – 700 kg/m3. After evaluating physical characteristics of the pellets, it can be concluded that blown glass pellets are suitable for producing thermal insulation composite, and blown slag pellets can be used for thermal insulation-constructional composite. When implementing this project in Lithuania, it is intended to create thermal insulation composite, which coefficient of heat conductivity would be 0.06 – 0.07 W/m*K. The material of this composite could be used for creating sheets that are used for the production of forms. A new proposed production technology of exterior walls would consist of the following steps: Production of thermal insulation sheets; - Production of partition forms using thermal insulation sheets; - Filling the forms with the thermal insulation composite at the construction site; Foundation structures would use bearing reinforced concrete, which would be formed by hearth on a surface made of thermal insulation composite, which λ would be about 0.06 – 0.07 W/m*K, and for the roof structure would be made of thermal insulation sheets from thermal insulation material. It should be noticed that the binder in all composites is porous concrete, which ensures excellent migration of water vapor through the partition from indoor to outdoor; cement composite ensures the resistant to frost, and the structure of single-layer partition, which is formed from a smooth material ensures intended thermal resistance of the partition R = 8 m2*K/W, when the wall is no more than 0.5 m. Described technical solutions are the object of Lithuanian scientists’ research that is running for a few years already. Obtained research results encourage that the goals will be implemented. The partners of the project in the Czech Republic deal with the similar problems by using blown slag pellets. During the research, the density of blown slag pellets was reduced from 700 kg/m3 to 350 kg/m3 while preserving sufficiently high qualities of pellet hardness. Pellets of increased hardness allow creating bearing cement composites that have reduced coefficient of heat conductivity. According to the option proposed by Czechs, mural panels will be manufactured in closed premises by using industrial method, and mounting, patching, storing, and final finish works will be carried out at the construction site. According to the “Eureka” project, Czechs will create bearing and thermal insulation composites and its production technology, equipment necessary to manufacture partitions and mount them at the construction site, and also, mechanisms and materials for connecting and storing the panels. In the Czech Republic, the works related to this direction are protected by Czech patents, so it allows believing that the goals of the project will be implemented successfully. We believe that the “EUREKA” project will allow creating and applying new thermal insulation materials and thermal insulation-constructional materials from technogenic waste in manufacturing, and they will be protected by European patents. Newly created materials and their production technologies could attract other European countries, which face similar problems.
Acronym: 
Enclosurewasteconcre
Project ID: 
8 790
Start date: 
01-07-2013
Project Duration: 
36months
Project costs: 
700 000.00€
Technological Area: 
Recycling, Recovery
Market Area: 
Construction

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.